refactor: unify workspace exclusions and reduce service duplication

[qkal]

Summary

Reduces duplicated logic and aligns workspace handling across copy and inspection paths.

Findings addressed

• Shadow copy and workspace inspection used different exclusion rules, causing inconsistent Python file counts and metadata
• apply_safe_fixes rejection logic was duplicated in two places in validate_patch_service
• Patch-size risk thresholds were hardcoded while max_patch_bytes is configurable

Changes

• New exclusions.py module with shared is_workspace_path_excluded and secret-file matching
• shadow.py and workspace.py now use the shared exclusion helper
• Extracted _reject_apply_safe_fixes helper in service.py
• Risk scoring thresholds derived from config.max_patch_bytes
• Unit tests for exclusion rules

Test plan

• pytest tests/unit/test_exclusions.py
• Full unit suite passes (338 tests)

  

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 7f2d06e2-6b1b-4252-bb7d-530511dd3af6

📥 Commits

Reviewing files that changed from the base of the PR and between 773290f and 9878287.

📒 Files selected for processing (6)

• src/agent_quality_mcp/exclusions.py
• src/agent_quality_mcp/risk.py
• src/agent_quality_mcp/service.py
• src/agent_quality_mcp/shadow.py
• src/agent_quality_mcp/workspace.py
• tests/unit/test_exclusions.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cursor/maintainability-dedup-6196

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.